NH2

Cross sections

Cross section figure.


[An explanation of the cross sections in this database]
[All cross sections — variable wavelength scale]
[All cross sections — variable wavelength scale in binary hdf5 format]
[All cross sections — 0.1nm wavelength scale]
[Photodissociation cross section — separate lines and continuum]
[Photoionisation cross section — separate lines and continuum]
[Download cross section figure as pdf]

Photodissociation and ionisation rates (s-1)

Radiation Photodissociation Photoionisation
ISRF 9.51e-10 1.90e-10
Mathis 6.27e-10 1.51e-10
4000K 5.47e-10 1.66e-15
10000K 1.29e-09 1.41e-11
20000K 1.04e-09 1.80e-10
Lyman-alpha 4.76e-12 0.00e+00
Solar 4.34e-10 8.71e-12
TW-Hya 4.35e-10 5.79e-11
Cosmic ray UV 7.15e-14 1.35e-14

[An explanation of the interstellar photo rates.]
[An explanation of the cosmic-ray induced photo rates.]
[An explanation of the radiation fields listed below.]
[Download all rates in a csv file.]

Shielding functions and fitted constants

Photodissociation

Radiation γE2 γexp k0fit γfit Line data Dust data
ISRF 1.57 2.31 0.60 2.05 [Download] [Download]
Mathis 1.57 2.31 0.59 2.05 [Download] [Download]
4000K 1.51 2.21 0.64 1.99 [Download] [Download]
10000K 1.52 2.23 0.64 2.00 [Download] [Download]
20000K 1.55 2.28 0.61 2.03 [Download] [Download]
Lyman-alpha 2.11 2.97 0.58 2.70 [Download] [Download]
Solar 1.51 2.21 0.64 1.99 [Download] [Download]
TW-Hya 1.53 2.25 0.63 2.02 [Download] [Download]

Photoionisation

Radiation γE2 γexp k0fit γfit Line data Dust data
ISRF 2.94 3.97 0.49 3.62 [Download] [Download]
Mathis 2.97 4.00 0.49 3.64 [Download] [Download]
4000K 2.70 3.68 0.51 3.34 [Download] [Download]
10000K 2.90 3.92 0.49 3.56 [Download] [Download]
20000K 2.98 4.01 0.49 3.65 [Download] [Download]
Lyman-alpha - - - -
Solar 3.20 4.26 0.48 3.89 [Download] [Download]
TW-Hya 3.06 4.10 0.48 3.74 [Download] [Download]

[An explanation of the shielding functions and parameterisations.]
[Download all γ factors in a csv file.]
[Download all dust and line shielding functions in a zip file.]